Scientists walked through a forest in Napa County, California, to search for a rare yellow mushroom. The mushroom is called the Manzanita butter clump. A scientist named Jessica Allen joined the search with other nature lovers. The group looked under trees and near rocks. The team hoped to discover the rare mushroom, but many different lichens and fungi were found instead.

Fungi are very important in nature. They help forests stay healthy and help plants grow. Scientists believe millions of fungi species exist on Earth, but many are still unknown. Some fungi face problems from pollution, climate change, and habitat loss. Because of this, scientists and volunteers work together to study and protect them.